Feed-water heater.



C. ROCHELLE.

FEED WATER HEATER.

APPLICATION F|LEn1uNE'19.1914.

Lmmm. Patented Apr. 18,1916.

au E M n m Afro/mns THB COLUMBIA PLANDGRAPH C0., WASHINGTGN, D. c.

FEED-WATER HEATER.

LIOJUWS.

Specification of Letters Patent.

ratentea apr. is, miie.

Application led .T une 19, 1914. vSerial No. 846,098.

To all whom it may concern Be it known that I, CARL ROCHELLE, a

. citizen of the United States, and a resident n connection withlocomotive boilers, and it consists in the combinations, constructions,and arrangements herein described and claimed.

An object of my invention is to provide a device by means of which thewater with which the boiler is charged may be heated prior to itsadmission to the boiler by heat from the fire box, with means forpreventing a disastrous discharge of steam into the cab of the enginefrom the fire box in the event of the burning out of the water heatingparts which are disposed in the fire box.

A. further object of my invention is to provide a novel form of safetydevice for boilers which are provided with feed water heaters, which maybe readily attached and which will prevent dangerous explosions, whileat the same time serving as a means for keeping the water heater filledwith water at all times, thereby lessening they danger of the burningout of the water heater.

Other objects and advantages will appear in the following specificationsand the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawings forming part ofthis application in which-w Figure 1 is a side view `of a boiler, one ofthe water heaters being shown in section, Fig. 2 is a section along theline 2-2 o-f Fig. 1. looking in the direction of the arrows, Fig. 3 isan enlarged detail view of a check valve, and Fig. l is, a sectionalview through a by-pass and a check valve of the intake pipe.

of any suitable form vof boiler, but the invention is particularlyadapted for boilers of the Water-tube type, such as those used onlocomotives.

Referring now to the drawings 1 denotes the ash pit, 2 the grate barsand 3 the interior of the fire box. Disposed on the sides of the lirebox are water heating compartments l and 5 respectively. Each of thesecompartments is provided with a series of batlies 6, adjacent bafflesextending from opposite ends and terminating so as to leave a passage 6Lat opposite ends of adjacent baffles. The water heating compartments 4Land 5 besides being the means of heating the feed water also serve asmeans for preventing the burning out of the side of the lire box therebydispensing with the need of refractory linings at these places.

From Fig. 1, it will be seen that a steam pipe 7 extends from the top ofthe boiler which I have denoted ingeneral by B to an injector 8, whichmay be of any suitable type, and which is connected with a cold waterinlet pipe 9 in the usual manner. rllhe end of the injector is connectedwith a pipe 10 which enters the boiler at 11. A. cut-out cock 12 isprovided in the pipe 10.

Communicating with the pipe 10 between the cutout cock and the injector8 is a pipe 13 which is provided with a check valve 14. The pipe 13enters the compartment such as that shown at 5 at or near the bottom,while a pipe 15 communicates with the top part yofthe compartment andenters the boiler at 16. The pipe 15 is provided with a check valve 17.A by-pass 18 is placed around the check valve `17 and is provided with ashutolf cock 19.

The description of the feed water connections has been in connectionwith the apparatus on one side of the boiler, but it will be understoodthat a duplicate arrangement is provided for the other side of theboiler. Thus the members 7 to 19 inclusive have corresponding members 7to 19 inclusive on the opposite side of the boiler. In Fig. 4- it willbe seen that the by-pass 18 is relatively small as compared with thepipe 15.

, j 'Ihe arrangement of these pipes forms one In carrying out myinvention I make use of the main features of the invention as will befully pointed out hereinafter.

From .the foregoing description of the various parts of the device theoperation thereof may be readily understood. Cold water enters theinjector through the pipe 9, while steam enters through the pipe 7. Whenthe stop-cock 12 is closed water is injected through the pipe13 into thelower part of the compartment 5 on one side, from whence it flows aroundthe baffles or partitions 6 thence flowing through the pipe 15 and pastthe check valve into the boiler.

I The water is preheated by its passage through the compartment 5 whichforms the side of the fire-box so that when it enters the boiler littleheat is required to generate steam. The water compartment in the firebox forms a protection to the wall of the fire box, thereby preventingthe burning out of the latter.

When the re box is cooled off, the presence of the by-pass-lS will keepthe water heating compartments filled because the water in the boilerwill flow through the bypass into the water heating compartments, sothat when the fire box is again heated u these compartments will befilled with water and will not be burned out under the ordinarycircumstances.

1f after long continued use or through accident or injury to theinterior wall of the compartments a break should occur, steam n from theboiler cannot pass back into the water heating compartment withsufficient force to injure those in the cab, because of the fact thatthe by-pass is too small to prevent it.

The device is designed to prevent accidents in which feed water heatershave parts exposed to the direct action of the fire in the fire boxwhich are liable to be burned out and thereby permit the steam to flowback through the fire box into the cab, thus injuring the occupants ofthe cab. It will be noted that the by-.pass 18 serves the double purposeof permitting water to flow back so'as to fill the water heatingcompartments when the latter' have cooled off. It will be understoodthat this return flow is very slow owing to the small diameter of theby-pass, but nevertheless it is entirely sufficient for the purposebecauseA it takes time after the water heater has cooled off to fire upand this time is amply suflicient to permit the filling of the waterheater. Of course, if the water heater should burn out the check valve17 which opens to permit the water to enter the boiler would prevent thereturn of steam and water into .the water heater. The by-pass 18 is sosmall that the little amount of steam which is forced back around theby-pass will not cause an explosion in the fire box and will give plentyof time to the engineer or fireman to close the stop cock 19 in thebypass,vthereby preventing any other return flow of Water or steam.

Another feature to which I desire to call attention is the fact that ifthrough any accident the water heater should be put out of commissionthe stop cock 12 may be turned so as to permit the entrance of water fthrough the pipe 10.

am aware that feed water heaters having a compartment in the firechamber have been used before but I know of no arrangement by which thewater is permitted to enter the boiler after being heated with means forpreventing a disastrous flow of steam back into the heater and at thesame time permitting a slow flow of water into the heater.

I claim:

1. The combination with a boiler and an injector, of a feed water heaterdisposed between the injector and the boiler, connections between saidinjector, said feed water heater, and said boiler, and means formaintaining a full supply of water in said water heater when the latterhas cooled off.

2. The combination with a boiler and an injector, of a feed water heaterdisposed between the injector and the boiler, connections between saidinjector, said feed water heater, vand said boiler,and means formaintaining a full supply of water in said water heater when the latterhas cooled off, said last named means also preventing an undue flow ofsteam from the boiler into the water heater.

3. The combination with a boiler and an injector, of a feed water heaterdisposed between the injector and the boiler, connections between saidinjector, said feed water heater, and said boiler, means in saidconnection for permitting a full flow of water from the water heaterinto the boiler, and for permitting a slow return of the water from theboiler into the feed water heater when the latterl has cooled off.

4. The combination with a boiler and an injector, of a feed water heaterdisposed between the injector and the boiler, connections between saidinjector, said feed water heater, and said boiler, means in saidconnection for permitting a full flow of water from the water heaterinto the boiler, and for permitting a slow return of the water from theboiler into the feed water heater when the latter has cooled off', saidlast -named means serving to prevent an undue flow ofsteam from theboiler into the water heater when the latter has burned out.

'5. The combination with a boiler and an injector, of a feed waterheater disposed between the injector and the boiler, connections betweensaid injector, said feed water heater, and said boiler, a check valvedisposed inv the connections between the boiler and. the Water heater'for permitting a full flow of steam from the boiler into the Water flovof Wterbfrom the Walter heater rlllto the heater when the latter hasburned out. boi er, an a ass of re atve sma cross sectional areayaoundsaid @begli Valve for CARL RGCHELLE' permitting a slow return of Waterfrom the Witnesses:

boiler into the Water heater When the latter LEROY PARKER KENNEDY. hascooled ofi", While preventing an undue JAMES HUNTER LAWRENCE.

lopies nf this patent may be obtained forve cents `each, by addressingthe Commissioner of Patents, Washington, D. C.

